Parallel shank dual socket wrench



Nov. 6, 1951 P. L. HUSS 2,574,212

PARALLEL SHANK DUAL SOCKET WRENCH 2 SHEETSSHEET 1 Filed June 7, 1950 f. INVENTOR. PHILIP L. HUSS FIG I Nov. 6, 1951 P. L. HUSS PARALLEL SHANK DUAL SOCKET WRENCH 2 SHEETS-SHEET 2 Filed June 7, 1950 IN VENTOR PHILIP L. HUSS ATTORNEY Patented Nov. 6, 1951 f' UNITED STATES PATENT OFFICE I w W -*-2,574,z12 I I w PARALLEL SHANK DUAL SOCKET WRENCH Philip L. Huss, LaiB elle, Fla. 2 Application June 7, 1950, Serial This invention relates to an improvement in a dual wrench, of the type that has utility in the tighteningof twin or dual nut or stud assemblies, such as are found in the packing gland structure of duplex pumps and the like.

In this class of packing gland assembly, it is essential that the glands be drawn up evenly against the packing in the stufling boxes and it is, therefore, of utmost importance that the retaining nuts, or fastenings, be tightened with uniform tensional force whereby to bring the gland up against the packing in a substantially uniform pressure-exerting plane.

It is an object of this invention to provide a dual wrench capable of ready application to the retaining nuts of a, conventional duplex pump packing gland structure.

Another object is to provide a tool of the character described which may be readily and economically manufactured.

A further object is to provide a dual wrench which will be simple and efficient in assembly and compact in construction.

According to the invention, the dual wrench comprises a pair of parallel, elongated arms, the bottom ends of which are fitted with nut-engaging sockets adapted to pivot relative to the plane of the arms when rocked in one direction and to rotate with the arms when the arms are rocked in the opposite direction. At their upper ends, the arms are pivotably connected by a yoke having handle means secured thereto whereby to facilitate rocking the arms to impart rotation to the nut-engaging sockets in a uniform degree of arc with respect to both sockets. The yoke is depressed in the mid-portion thereof to provide a handle receiving space to permit the hand to work in a relatively closer position to the device assembly whereby to produce a compact wrench construction. The yoke is made in' two flat spaced-apart members adapted to receive the ends of the arms therebetween for pivotable connection therewith.

The invention is exemplified by a dual wrench embodied in the attached drawing wherein Fig. 1 is an elevation of the wrench and Fig. 2 is a view taken endwise of the device shown in Fig. 1, in partial section.

Fig. 3 is an enlarged detail in plan of a ratchet device usable with the invention, and

Fig. 4 is a section on line 4--4 of Fig. 3.

The dual wrench comprises a pair of parallel connecting arms I, which are flattened at their top portions as at 2 for reception between the 2Claims. (c1. s1-5s')f spaced-apart end of a yoke 3, to which they are pivoted as by pivot-pins 4.

The yoke 3 is formed in a downwardly bowed arc to provide a depressed mid-portion as at 3A in which is disposed a knurled handle 5, the bottom end of which is suitably attached between the yoke members. By this construction, the operators hand is brought relatively lower within the handle-and-yoke assembly to result in a more compact tool.

At their lower ends, the arms I are fitted against their faces, on the same side, with a wrench-socket 6 consisting of a hollow cup member having a back portion I which is adapted to pass over a shaft 8 designed to detachably support the socket 6. This shaft 8 forms the external portion of a ratchet mechanism housed within the bottom portion of the arm I and of conventional construction to permit rotation of the shaft 8 in one direction and to resist its rotation in the opposite direction, according to a pawl device setting with which the ratchet is equipped. Such a ratchet device is exemplified in Figs. 3 and 4 and may include a ratchet I!) having a cylindrical base journaled in a plate I2 positioned within the shank or arm I of each of the wrench members. The ratchet is toothed as at I3 to receive a pawl I4 which is rotatable upon a pin [5 projecting upwardly from the back wall of the arm and received in the plate [2. A spring l5 operates in the usual manner to hold the pawl against rotation in one direction but allows its oscillation in the opposite direction whereby to rotate the ratchet l0 and the squared shaft 8 carried thereby so as to apply a rotational force to the socket 6, and thus to the nut held therein, as will be understood.

The interior wall of the socket is fluted or otherwise serrated as at 9 whereby to facilitate the gripping thereby of a polygonal nut or stud member.

In practice, when it is desired to apply the wrench to a pair of spaced apart fastenings as, for example, the gland-securing nuts on a duplex pump structure, the ratchet device in the arms I is pre-set to produce rotation of the sockets 6 in clockwise or counter-clockwise direction, as will 3 in hand. The spaced apart plate construction of the yoke permits a simple and economical assembly with the arms I at the same time that the space between the plates accommodates the shank of the handle 5.

Having thus described the invention and the mode of its practice, what I claim as new and desire to secure by Letters Patent is:

A dev c of the character and for th purpose deseribed comprising, in combination, aJDair of parallel spaced apart arms terminating at corresponding ends thereof in flattened portions, a yoke pivoted at each end thereof to one of said flattened portions, and a handle securedrto :the

mid-portion of said yoke, a fasteningriengaging member pivotably connected to each of said arms at the opposite ends thereof and means carried by saidarms whereby to permit rotation of said 4 thereof in a corresponding par of fastening-engaging sockets and means to control the directional rotation of said sockets, of a yoke pivoted at each end thereof to one end of each of said arms opposite to said sockets, said yoke being bowed downwardly in the mid-portion thereof to form a hand-accommodating space and a. handle secured to said yoke at said mid-portion, said yok be ng formed of a ai io para le -p at d fin n a each nd reof 1 be r ng fo the ception of the end portions of said arms in pivotable connection therewith.

PHILIP L. HUSS.

7 REFERENCES CITED The following references are of record in the file of this patent:

fastening-engaging members by said arms upon UNITED STATES PATENTS 

